Note, that the square _Hole_ made in the _Bottom-Plate_ to receive the square _Shanck_ of the _Pin_, must be made a little wider than just to fit the square _Shanck_ of the _Pin_, because the _Mouth-piece_ must be so placed, that the end of the _Jaw_ next the _Throat_ must lie just even with the _Body_ it is to be joyned to; and also that the _Throat_ of the _Mouth-piece_ may be thrust perfectly close to the Sides of the _Carriage_ and _Body_: And when Occasion requires the _Shanck_ of the Letter to be lengthned, it may be set farther off the _Carriage_, that an _Asidue_, or sometimes a thin _Plate_ of _Brass_ may be fitted in between the _Carriage_ and the _Throat_ of the _Mouth-piece_, as shall farther be shewed when I come to justifie the _Mold_. ¶. 7. _Of the_ Register. Behind the _Mold_ is placed the _Register_, as at _f i h_, which I have also placed apart in the aforesaid Plate, as at C, that it may the more perspicuously be discerned, and a more particular account of its parts be given, which are as follows: C _a a b c d e_ The _Register_. _a a_ The _Sholders_. _b c_ The _Neck_. _d_ The _Cheek_ returning square from the Plate of the _Register_, and is about an _English_ thick. _e_ The _Screw Hole_. It is made of an _Iron_ Plate about a _Brevier_ thick; its upper-Side is straight, but its under Side is not: For at _a a_ projects downwards a small piece of the same Plate, which we may call the _Sholders_, of the Form you see in the Figure. These _Sholders_ have two small _Notches_ (as at _b c_) filed in them below the _Range_ on the under side of the _Register_, which we will call the _Neck_, and is just so wide as the _Bottom-Plate_ is thick. This _Neck_ is set into a square _Notch_, filed so far into the _Bottom-Plate_, that the flat inside of the _Register_ may stand close against the hind side of the _Carriage_ and _Body_; and this _Notch_ is filed so wide on the left-Hand, that when the side _b_ of the _Neck_ stands close against the left-hand Side of this _Notch_ (as it is posited in the Figure) the _Cheek_ of the _Register_ stands just even with the Edge of the _Body_. And this _Notch_ is also filed so wide on the right-Hand Side, that when the _Neck_ at _c_ stands close against the right-hand Side of the _Notch_, the _Cheek_ of the _Register_ may remove an m, or an m and an n from the edge of the _Body_ towards the right hand: And the _Sholders a a_ are made so long, that when either Side of the _Neck_ is thrust close against its corresponding side in the _Notch_ of the _Bottom-Plate_, the upper Edge of the opposite _Sholder_ shall hook or bear against the under-side of the _Bottom-Plate_, and keep the whole _Register_ steady, and directly upright to the Surface of the _Bottom-Plate_.